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audioguru said:Sure, buy a Smartkit, I think from Greece. They are sold here too.
audioguru said:The multimeter by Smartkit is very old. Your pic shows an IC that was made in 1990. The Smartkit is a project at www.electronics-lab.com and causes people many problems as discussed in the forum. It wastes a lot of power lighting LEDs, most multimeters today use a low current LCD display.
audioguru said:I don't know about Eagle.
You already posted a power supply for the LED digital voltmeter. This voltmeter's current is so high that little 9V batteries won't last very long. The 9V battery in my LCD multimeter lasts for years.
The linear output of your project connects to a voltage divider which feeds the input of the voltmeter so it that it scales from 0V to 200mV.
If you can't figure out how to make a simple voltage divider then you could use trial and error until it works.4electros said:You mean that i have to add voltage divider to the linear output of my project, how can i do that , what are the resistor values to suit that purpose?!
4electros said:Just a question about ICL7107 , Do I have to add the capacitors and resistors (as in the image above) externally to the IC ...I want to add LCD display as an output of ICL7107 instead of seven segment LEDS in order not to consume high current so that 9v battery won't last very long..
any suggestion will be appreciated !
Of course the parts must be used.4electros said:Just a question about ICL7107 , Do I have to add the capacitors and resistors (as in the image above) externally to the IC?
Don't you have the datasheet?I want to add LCD display as an output of ICL7107 instead of seven segment LEDS in order not to consume high current so that 9v battery won't last very long.